<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="Demo04.js"></script>
<title>城市联动框</title>
</head>

<body>
省份：<select id="prevince" onchange="showCity()">
	<option>省份</option>
    <option>广东</option>
    <option>湖南</option>
</select>
城市：<select id="city" ><option>城市</option></select>
</body>
</html>
